PLANT: Rhizomatous, somewhat fleshy perennials, 3-30 cm tall with upright or ascending stems. LEAVES: cauline, generally alternate on the upper portion of the stem and opposite near the base of the stem, 5-25 mm long, sessile; blade oval to oblong or oblanceolate, glabrous, the margins entire. INFLORESCENCE: a single sessile flower in the axils of leaves. FLOWERS: white to pinkish; calyx 4-5 mm long, lobed ca. ½ its length, the lobes 5; corolla lacking; stamens 5; ovary superior. FRUITS: valvate. NOTES: A monotypic genus widespread in arctic and temperate regions of N. Amer. and Eur. (Greek: bluish-green, in reference to the plant's color). REFERENCES: Cholewa Anita F. 1992. Primulaceae. Ariz.-Nev. Acad. Sci. 26(1)2.